alpha-amino-anthraquinones and process of making same



Patented Nov. 2 1, 1939 UNITED smirasv PATENT, OFFICE u-AMINO-ANTHRAQUINONES rRocEss or MAKING SAME Friedrich Felix, Basel, Paul Grossmann, Binningen,,and Max Bommer, Riehen, Switzerland, assignors to the firm of Society of Chemical Industry in Basle, Basel, Switzerland No Drawing. Application February'l, 1938, Se-

rial No. 188,190. In Switzerland February 3,

6 Claims.

It has been found that new, valuable dyestuffs of the anthraquinone series are obtained by causing u-amino anthraquinones which contain in one a-position an alkyl radical substituted by a mobile halogen atom to react in the heat with N- v-s--sos11 wherein 1: stands for alkylene. These products, in the form of their alkali salts, dissolve in water to red, to violet, to blue and to green solutions and dye the fiber, for instance wool, from. an acid bath tints of the above indicated shades which may be characterized by excellent purity. These new dyestuffs can also be used with success for other purposes, for example for printing, particularly for printing artificial silk from esters of cellulose, i. e., the so-called acetate artificialsilk. Prints are then obtained which are also characterized by their purity and which, besides other valuable fastness properties gpossess the valuable property of being fast tosublimation. The new dyestuffs can be furtherused for t he manufacture of pigments for dyeing artificial masses and the like.

For manufacturing such dyestulfs one proceeds preferably in such a manner that amino-anthraquinones whichflcontain a primary amino-group in at least one u-position, are treated with such alkylating agents which introduce alkyl radicals substituted by halogen atoms. Such agents are for example epichlorohydrinor epibromohydrin. There are thus formed a-amino groups substituted by alkyl radicals of which the alkyl radi-, cals are simultaneously substituted by, hydroxyl groups. By causing these products to react with salts of thiosulfuric'acid there are obtained products of the general formula wherein :1: represents an amino group standing in az-PDSitiOIl, of the formula in which general formula the alkylene radical is substituted by a hydroxyl group.

Another method for obtaining such compounds consists in exchangingin u-aminoanthraquinones substituted at the nitrogen atom. by alkyl radicals containing OI-I-groups, the OI-I-groups of the hydroxyalkyl radicals for halogen. I As is known, this can be effected by treating these hydroxyalkyl compounds with hydrohalic acids, such as hydrochloric acid or hydrobromic acid, halides of phosphorus and sulfur, such as phosphorus pentachloride, thionylchloride and the like. By the reaction of these products with salts of thiosulfuric acid there are obtained products of the general formula A (to wherein m represents an amino group standing in int-position, of the formula in which general formula the alkylene radical is not substituted by OH-groups.

The following examples illustrate the manufacture and also the application of the new dyestuffs:

Example 1 30 parts of 1-amino-4-methylamino-anthraquinone 'are dissolved in 120 parts of glacial acetic acid, and are converted into l- -chloro- ,B-hydr-oxypropylamino) 4 methylaminoanthraguinone by addition of 45 parts of epichlorhydrin.

20 parts of -methylamino-4- -chloro-fi-hydroxypropylamino)-anthraquinone, 250 parts of acetone, 25()- parts of Water and 20 parts of sodium thiosulfateare together heated to -120 C. in a closed vessel for 5 hours whereby a watersoluble product is produced. The acetone is distilled and the dyestuff of the formula separated by means of ammonium chloride. It is filtered and dried. It is a dark powder soluble in Water to a blue solution and dyeing in aqueous solution acetate artificial silk blue tints.

In similar manner the thiosulfate residue may be introduced into l-anilido-l-('y-chloro-B-hydroxypropylamino)-anthraquinone, into l-amino-l- ([i-chlorethylamino) -anthraquinone, l-p-hydroxyethylamino 4 p chlorethylaminoanthraquinone, into 1- (p-chlorethylamino) 1:4;- di-(e-chlorethylamino) 5 8 dihydroxyanthraquinone and 1:4z5-di-(fi-chlorethylamino) -8- hydroxyanthraquinone or the like. There are thus obtained products such as (which dyes wool greenish blue tints) Example 2 4 parts of the 1-('y-chloro-B-hydroxypropylamino) -anthraquinone made from l-amino-anthraquinone by reaction with epichlorhydrin are mixed with 100 parts of a mixture of 50 parts of water, 50 parts of acetone and 4 parts of crystallized sodium thiosulfate, and the whole is heated under pressure at 120 C. for 12 hours. There is obtained a water-soluble dyestufi of the formula which colors both animal fibres and acetate artificial silk in a dye bath or by printing pure red tints.

into 1 Example 3 40 parts of the product of the reaction of lz-diaminoanthraquinone with an excess of epichlorhydrin in glacial acetic acid at 60 C. are caused to react in 500 parts of water and 500 parts of ethyl alcohol with 10 parts of sodium thiosulfate for 5 hours by heating to 120 C. under pressure. There is obtained a water-soluble deep blue dyestufi ofthe formula III-CHz-CH- CHrS-fiOs H H suitable for dyeing and printing animal fibres and acetate artificial silk.

In quite analogous manner there is obtained from 1-amino-4- (4'-aminophenylamino) -anthraquinone by successive reaction with epichlorhydrin and sodium thiosulfate a green water-soluble dyestuflf.

Example 4 0.2 part of the dyestuff of Example 3 is dissolved in 400 parts of water and there is added to this bath 1 part of crystallized sodium sulfate; 10 parts of wool are then entered into the bath and 0.4 part of concentrated formic acid is added. The bath is heated to boiling and dyeing continued for one hour at 95-100 C. After washing and drying the dyeing is a pure deep blue.

Example 5 Acetate artificial silk is printed in accordance with the following prescription:

1- 2 parts of the dyestufi of Example 1, first paragraph are dissolved in 29-28 parts of water and there are introduced '70 parts of gum thickening 1:1

100 parts or 1- 2 parts of the dyestuff of Example 1 second paragraph are dissolved in -29 parts of water and 65 parts of gum thickening 1:1 and 4 parts of urea are introduced.

100 parts.

After printing and drying the goods are steamed in a boiler for about hour at atmosphere pressure and then thoroughly rinsed. There are obtained penetrating brilliant blue prints on acetate artificial silk.

Example 6 Chlorinated wool is printed in accordance with the following prescription:

1- 2 parts of the dyestufiof Example 1, second paragraph, are dissolved in 26-23 parts of water and 5 parts of glycerine, and there are introduced 65 parts of gum thickening 1:1 and 5 parts of tartaric acid 1:1

100 parts.

After printing and drying the goods are steamed in a boiler for hour at 54; atmosphere pressure and then well rinsed. There are obtained penetrating brilliant blue prints on the wool.

What we claim is:

1. a-aminoanthraquinones in which at least 5 one amino group is substituted by a substituent of the formula :v-SSO3H wherein a: represents a radical selected fromthe group consisting of the alkylene and hydroxyalkylene radicals containing at least 2 and not more than 3 car- 1 bon atoms, which products form dark powders which dissolve in water to red to violet, to blue and to blue-green solutions and dye the fiber similar tints.

2. a-amino-anthraquinones of the general for.- 1-5 mula H o I'M I 0 III-CH:

4. The product of the formula 0 MD I I N-CHr-CH-CHa-S-SOQI 5. The product of the formula n on 6. Process for the manufacture of m-aminoanthraquinones in which at least one amino group is substituted by a substituent of the formula :c-S-SOaH wherein :1: represents a radical selected from the group consisting of the alkylene and hydroxyalkylene radicals containing at least 2 and not more than 3 carbon atoms, comprising heating an amino-anthraquinone derivative which contains in at least one a-position an alkyl-amino group of the general formula I' Irhelogen wherein :1: stands for a radical selected from the group consisting of the alkylene and hydroxyalkylene radicals containing at least 2 and not more than 3'carbon atoms, with an alkali metal salt of thiosulfuric acid until said first-mentioned substituted a-amino-anthraquinone is obtained.

FRIEDRICH FELIX. PAUL GROSSMANN. MAX BOMMIER. 

